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and Technology, Xuzhou 221116, China Received 17 November 2013; accepted 15 January 2014 Abstract: The multi-granularity spatial-temporal-related access control (MSTAC) model was proposed to meet the spatial access control requirements for the service-oriented spatial data infrastructure (SDI). MSTAC extends the attribute constraints of role-based access control (RBAC), which includes the user’s location......